Weber 40 DCOM carburetor pump diaphragm
$ 21.3
Part number: 47407.267
Made in: Italy
Weber 40 DCOM Carburetor Pump Diaphragm
This pump diaphragm is used in the accelerator-pump circuit of a Weber 40 DCOM carburetor. It flexes with accelerator-pump movement to displace fuel and provide the additional fuel shot required during throttle opening, helping prevent a lean hesitation during transient response.
Accelerator-pump circuit component. A hardened, distorted, or damaged diaphragm can reduce pump-shot volume or cause inconsistent enrichment, leading to hesitation when the throttle is opened. Replacing the diaphragm is a service step when the accelerator-pump action is weak or the existing diaphragm no longer seals correctly.
Part number 47407.267 is identified for Weber DCOM applications. Confirm the carburetor family and diaphragm interface before installation, since pump diaphragms must match the cover pattern, central operating section, and sealing arrangement.
This replacement part is suitable for carburetor service and restoration work where the original component is worn, damaged, or missing.
Reference/MPN: 47407.267.
What Is Included
- Weber 40 DCOM carburetor pump diaphragm
- MPN 47407.267
- Made in Italy.
Important Fitment Note
Verify that your carburetor is a Weber DCOM unit and that the existing diaphragm carries the matching part number 47407.267 or an approved equivalent. Compare the removed part with the replacement for the mounting-hole pattern, outer sealing shape, central formed section, and pump-cover interface. Also check the diaphragm’s orientation and seating before tightening the pump cover.
Confirm the carburetor code and physical geometry before ordering; model-family names alone do not verify the diaphragm interface.
What you see is what you get
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